نتایج جستجو برای: cox proportional hazards

تعداد نتایج: 124379  

2017
Hirokazu Honda Tsutomu Hirano Masashi Ueda Shiho Kojima Shinichi Mashiba Yasuyuki Hayase Tetsuo Michihata Kanji Shishido Keiko Takahashi Nozomu Hosaka Misa Ikeda Daisuke Sanada Takanori Shibata

Apolipoproteins are associated with survival among patients on hemodialysis (HD), but these associations might be influenced by dysfunctional (oxidized) high-density lipoprotein (HDL). We assessed associations among apolipoproteins and oxidized HDL, mortality and cardiovascular disease (CVD) events in patients on HD. This prospective observational study examined 412 patients on prevalent HD. Bl...

2015
Henrik Stryhn

Page Title 1 Overview − hierarchical models 2 Calf mortality data 3 Hierarchical regression models 4 Hierarchical survival models: general approaches 5 Calf mortality data: multi-level Cox model 6 Methods for hierarchical Cox models 7 Pig lameness data 8 Pig data: hypothesis and first results 9 Pig data: Cox random slope models 10 Pig data: parametric models 11 Proportional hazards revisited 12...

Journal: :iranian red crescent medical journal 0
abbas rahimi foroushani department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, ir iran mahmoud salesi nephrology and urology research center, baqiyatallah university of medical sciences, tehran, ir iran zohreh rostami nephrology and urology research center, baqiyatallah university of medical sciences, tehran, ir iran ali reza mehrazmay behaviolar sciences research center, baqiyatallah university of medical sciences, tehran, ir iran jamile mohammadi department of psychology, faculty of humanities, tarbiat modares university, tehran, ir iran behzad einollahi nephrology and urology research center, baqiyatallah university of medical sciences, tehran, ir iran

conclusions by controlling the modifiable risk factors and modality of treatment in our study, physicians can reach more effective treatment. results at the end of the study, long-term graft failure was seen in 27 (10.2%) cases. one-year and 2-year graft survival after diagnosis of cancer were 93.6% and 91.7%, respectively. the univariate analysis showed that the incidence of chronic graft loss...

2007
Jerry J. Maples Susan A. Murphy William G. Axinn

We extend the proportional hazards model to a two level model with a random intercept term and random coeecients. The parameters in the multilevel model are estimated by a combination of EM and Newton-Raphson algorithms. Even for samples of 50 groups, this method produces estimators of the regression coeecient which are approximately unbiased and normally distributed. Two diierent methods, obse...

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